“…CE is a general term for a class of liquid‐phase separation methods and techniques implemented by taking the capillary as the separation channel and a high‐voltage electric field as the driving force, based on the characteristics of the sample charge, size, isoelectric point, polarity, affinity behavior, and phase distribution. CE has several advantages, including high separation efficiency, short analysis time, low sample and reagent consumption (nanoliter injection volumes, picograms of proteins) [20], a wide range of analytes (such as inorganic ions [21], small organic molecules [22], proteins [23], polymers [24], and whole viruses or cells [25]), and direct analysis of complex matrix samples. Furthermore, CE takes a physiological saline buffer solution as its separation medium; thus, molecules, such as enzymes, receptors, and DNA, are not easily denatured, making this a suitable method for the separation and analysis of biologically active macromolecules.…”